CN220819371U - A vibration and impact test fixture for airborne suspended objects - Google Patents

Abstract

The utility model belongs to the technical field of product testing, and particularly relates to an onboard suspension vibration and impact test fixture which comprises a main body structure, a suspension adapter plate and a flexible supporting system, wherein the main body structure comprises an upper cover, a base and a leveling counterweight, and the flexible supporting system comprises a flexible supporting vertical plate, a flexible supporting base, a guide bearing and a supporting air bag. The utility model has good mechanical properties, high rigidity, high natural frequency and good transmission property, can well complete vibration and impact tests of airborne suspended objects, can select different leveling counterweights according to different suspended objects, thereby adjusting the gravity center of a test system, protecting test equipment, and adapting different suspended object adapter plates to an upper cover, thereby realizing a set of main structure, completing vibration and impact tests of various suspended objects, and realizing flexible support systems in vertical test without using an electric vibration table vertical expansion table, greatly improving the effective thrust of the electric vibration table and improving the upper limit of test capability.

Description

A vibration and impact test fixture for airborne suspended objects

Technical Field

The utility model belongs to the technical field of product testing, and in particular relates to a vibration and impact test fixture for airborne suspended objects.

Background technique

During the hanging and free flight process, the onboard hanging objects are:

(1) Engine spoiler of mounted aircraft;

(2) Aerodynamic turbulence on the external surface during the flight process;

(3) Transmission of aircraft vibration:

(5) Structural resonance caused by aircraft maneuvering;

(6) During free flight, the exhaust noise of the external engine, the vibration or noise generated by the internal equipment, and the turbulence of the surface layer will cause vibration of the external weapons.

These vibrations and impacts will affect the performance of the onboard suspension.

As a weapon system installed for the first time on a certain type of aircraft, a certain suspension is subjected to severe vibration and impact loads during flight and take-off and landing. In order to ensure the safety of the suspension during flight, it is necessary to verify the vibration and impact resistance of a certain type of airborne suspension in the laboratory.

In actual vibration tests, the test piece or fixture is often larger than the dynamic table of the electric table. In this case, the original table needs to be expanded. A common method is to install an auxiliary expansion table.

Traditional fixtures for vibration and impact tests of suspended objects are mostly welded square steel, and their disadvantages are quite obvious. First, the mechanical transmission characteristics are poor, especially in the low-frequency band, the vibration and impact loads cannot be transmitted well; second, the center of gravity of the airborne suspended object is relatively forward, and the traditional fixture only simulates the installation method of the suspended object, and does not have the ability to adjust the center of gravity position of the test system, which is very harmful to the electric vibration table; third, each set of fixtures can only load one type of suspended object, which is not economical; fourth, the vertical direction test requires the use of the vertical extension table of the electric vibration table, which wastes effective thrust and has a limit on the upper limit of the weight of the tested suspended object.

Utility Model Content

In order to overcome the deficiencies of the prior art, the utility model provides a vibration and impact test fixture for an airborne suspended object.

The utility model is realized according to the following technical scheme.

A vibration and impact test fixture for airborne suspended objects, comprising a main structure, a suspension adapter plate connected to the main structure, and a flexible support system, wherein the main structure comprises an upper cover, a base connected to the upper cover, and a leveling counterweight, the suspension adapter plate comprises a rectangular bottom plate, the flexible support system comprises a pair of flexible support vertical plates parallel to each other, a flexible support base connected to the flexible support vertical plates, a guide bearing connected to the flexible support base, and a support airbag, the upper cover comprises a pair of parallel first end wall plates, a first connecting plate connected between the first end wall plates, and a lower end plate at the lower end of the first connecting plate, the first connecting plate comprises an inverted flat bottom V-shaped first connecting plate upper portion and two side walls of the first connecting plate upper portion extending from the lower ends The lower part of the first connecting plate parallel to each other, a plurality of first reinforcing plates are arranged on the outer side wall of the upper cover, the base is a vertical base or a horizontal base, the vertical base includes a pair of parallel second end wall plates, a second connecting plate connected between the second end wall plates and a first upper end plate at the upper end of the second connecting plate, the second connecting plate is in a flat bottom V shape, a plurality of rectangular second reinforcing plates with arc grooves between the upper and lower ends are vertically connected between the two side walls of the vertical base, a plurality of triangular third reinforcing plates and a fourth reinforcing plate are respectively arranged on the outer side of the bottom and the outer side walls of the vertical base, the leveling counterweight is a rectangular plate-shaped structure, the flexible supporting vertical plate includes a first vertical plate and a first horizontal plate vertically connected to the first vertical plate, the first vertical plate includes A trapezoidal upper portion with an arc groove at the upper end and a rectangular lower portion extending from the lower end of the trapezoidal upper portion, a plurality of triangular fifth reinforcing plates are arranged in the angle formed by the first vertical plate and the first horizontal plate, the flexible support base is a frame structure composed of a pair of parallel inverted trapezoidal support beams and a pair of L-shaped connectors vertically connected to the two ends of the inverted trapezoidal support beams, the L-shaped connector includes a rectangular second vertical plate and a rectangular second horizontal plate vertically connected to the second vertical plate, a plurality of trapezoidal sixth reinforcing plates are arranged in the angle formed by the second vertical plate and the second horizontal plate, the two ends of the second horizontal plate are vertically connected to the two ends of the inverted trapezoidal support beams, the guide bearing includes a parallel rectangular first upper connecting plate, a first lower connecting plate and a first upper connecting plate vertically arranged on the first upper connecting plate and a cylindrical bearing in the middle of the first lower connecting plate, a first sleeve and a second sleeve are respectively provided in the middle of the first upper connecting plate and the first lower connecting plate, the upper end of the cylindrical bearing passes through the first upper connecting plate and the first sleeve, and the lower end of the cylindrical bearing is embedded in the second sleeve, the first upper connecting plate of the guide bearing is connected to the second transverse plate of the L-shaped connecting piece, the first upper connecting plate is connected above the second transverse plate, the supporting airbag includes a parallel rectangular second upper connecting plate, a second lower connecting plate and a gourd-shaped rubber airbag arranged between the second upper connecting plate and the second lower connecting plate, the second upper connecting plate of the supporting airbag is connected to the second transverse plate of the L-shaped connecting piece, and the second upper connecting plate is connected below the second transverse plate.

Compared with the prior art, the beneficial effects of the utility model are:

1. It has good mechanical properties, high stiffness, high natural frequency, and good transfer characteristics, and can well complete the vibration and impact tests of airborne suspensions.

2. You can choose different leveling weights according to different suspended objects, or you can combine them into new weights in pairs to adjust the center of gravity of the test system and protect the test equipment.

3. The top of the upper cover is designed as a porous structure, which can be adapted to different suspension adapter plates according to different suspension objects, thereby realizing a set of main structure to complete vibration and impact tests of various suspension objects and save resources.

4. The vertical test is equipped with a flexible support system, so there is no need to use a vertical extension table for the electric vibration table, which greatly improves the effective thrust of the electric vibration table and increases the upper limit of the test capacity.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the utility model;

FIG2 is a schematic diagram of the connection between the upper cover and the vertical base;

FIG3 is a top view of the upper cover of the present invention;

FIG4 is a schematic diagram of the upper cover in the present utility model;

FIG5 is a schematic diagram of a vertical base in the present invention;

FIG6 is a second schematic diagram of a vertical base in the present invention;

FIG7 is a schematic diagram of a horizontal base in the utility model;

FIG8 is a schematic diagram of a leveling counterweight in the present invention;

FIG9 is a schematic diagram of a suspension adapter plate in the present invention;

FIG10 is a second schematic diagram of a suspension adapter plate in the present invention;

FIG11 is a schematic diagram of a flexible support system in the present utility model;

FIG12 is a schematic diagram of a flexible support plate in the present invention;

FIG13 is a schematic diagram of a flexible support base in the present utility model;

Figure 14 is a schematic diagram of a guide bearing in the utility model;

15 is a schematic diagram of the first upper connecting plate and the first sleeve in the guide bearing;

FIG16 is a schematic diagram of a first lower connecting plate and a second sleeve in a guide bearing;

Figure 17 is a schematic diagram of a cylindrical bearing;

FIG18 is a schematic diagram of a support airbag in the present utility model;

FIG19 is a schematic diagram of a second lower connecting plate in the support airbag;

Figure 20 is a schematic diagram of a rubber airbag;

Fig. 21 is a cross-sectional view of the support airbag;

Figure 22 is a schematic diagram of the support airbag I in the utility model;

Figure 23 is a schematic diagram of the second lower connecting plate Ⅰ in the support airbag Ⅰ.

Among them, 1-upper cover, 11-first end wall plate, 12-first connecting plate, 121-upper part of the first connecting plate, 122-lower part of the first connecting plate, 13-lower end plate, 1a-first through hole, 1b-lifting hole, 1c-first reinforcing plate, 1d-first threaded hole, 1e-first through hole, 2-base, 21-vertical base, 211-second end wall plate, 212-second connecting plate, 213-first upper end plate, 214-boss, 21a-second through hole, 21b-second through hole, 21c-second reinforcing plate, 21d-second threaded hole, 21e-third reinforcing plate, 21f-fourth reinforcing plate Strong plate, 22-horizontal base, 221-third end wall plate, 222-third connecting plate, 223-second upper end plate, 22a-tenth through hole, 22b-fourth through hole, 22c-seventh reinforcing plate, 22d-eighth reinforcing plate, 3-leveling weight, 3a-third threaded hole, 3b-third through hole, 4-bottom plate, 4a-fourth threaded hole, 4b-horizontal through hole, 4c-vertical through hole, 41-adapter I, 42-adapter II, 5-flexible support vertical plate, 51-first vertical plate, 52-first horizontal plate, 511-trapezoidal upper part, 512-rectangular lower part, 5a-fifth through hole, 5b-first Waist-shaped hole, 5c-fifth reinforcement plate, 6-flexible support base, 61-inverted trapezoidal support beam, 62-L-shaped connector, 621-second vertical plate, 622-second horizontal plate, 6a-connecting vertical plate through hole, 6b-connecting support airbag through hole I, 6c-connecting guide bearing through hole, 6d-sixth reinforcement plate, 6e-sixth through hole, 6f-second waist-shaped hole, 6g-connecting support airbag through hole II, 7-guide bearing, 71-first upper connecting plate, 71a-seventh through hole I, 72-first lower connecting plate, 72a-seventh through hole II, 72b-seventh through hole III, 73-cylindrical bearing, 73a-seventh screw Holes, 74-first sleeve, 75-second sleeve, 8-support airbag, 81-second upper connecting plate, 81a-eighth through hole I, 81b-third waist-shaped hole, 81c-third through hole, 82-second lower connecting plate, 82a-eighth through hole II, 82b-fourth waist-shaped hole, 82c-fourth through hole, 83-rubber airbag, 83a-sixth threaded hole, 83b-eighth through hole III, 9-support airbag I, 91-second upper connecting plate I, 91a-ninth through hole I, 92-second lower connecting plate I, 92a-ninth through hole II, 92b-fourth waist-shaped hole I, 92c-fourth through hole I.

Detailed ways

The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 23, a vibration and impact test fixture for airborne suspended objects includes a main structure, a suspension adapter plate connected to the main structure, and a flexible support system, wherein the main structure includes an upper cover 1, a base 2 connected to the upper cover 1, and a leveling counterweight 3, the suspension adapter plate includes a rectangular bottom plate 4, the flexible support system includes a pair of flexible support vertical plates 5 parallel to each other, a flexible support base 6 connected to the flexible support vertical plates 5, a guide bearing 7 connected to the flexible support base 6, and a support airbag 8, the upper cover 1 includes a pair of parallel first end wall plates 11, a first connecting plate 12 connected between the first end wall plates 11, and a lower end plate 13 at the lower end of the first connecting plate 12, the first connecting plate 12 includes a first connecting plate upper portion 121 in an inverted flat bottom V shape and first connecting plate lower portions parallel to each other extending from the lower ends of two side walls of the first connecting plate upper portion 121 The upper cover 1 has a plurality of first reinforcing plates 1c on its outer side wall, the base 2 is a vertical base 21 or a horizontal base 22, the vertical base 21 comprises a pair of parallel second end wall plates 211, a second connecting plate 212 connected between the second end wall plates 211, and a first upper end plate 213 at the upper end of the second connecting plate 212, the second connecting plate 212 is in a flat-bottomed V-shape, a plurality of rectangular second reinforcing plates 21c with arc grooves between the upper and lower ends are vertically connected between the two side walls of the vertical base 21, a plurality of triangular third reinforcing plates 21e and a fourth reinforcing plate 21f are respectively provided on the outer side of the bottom and the outer side walls of the vertical base 21, the leveling weight 3 is a rectangular plate-shaped structure, the flexible supporting vertical plate 5 comprises a first vertical plate 51 and a first horizontal plate 52 vertically connected to the first vertical plate 51, the first vertical plate 51 comprises a ladder with an arc groove at the upper end The first vertical plate 51 and the first horizontal plate 52 are provided with a plurality of triangular fifth reinforcing plates 5c in the angle formed by the first vertical plate 51 and the first horizontal plate 52. The flexible support base 6 is a frame structure composed of a pair of parallel inverted trapezoidal support beams 61 and a pair of L-shaped connecting members 62 vertically connected to the two ends of the inverted trapezoidal support beams 61. The L-shaped connecting member 62 includes a rectangular second vertical plate 621 and a rectangular second horizontal plate 622 vertically connected to the second vertical plate 621. A plurality of trapezoidal sixth reinforcing plates 6d are provided in the angle formed by the second vertical plate 621 and the second horizontal plate 622. The two ends of the second horizontal plate 622 are vertically connected to the two ends of the inverted trapezoidal support beam 61. The guide bearing 7 includes a parallel rectangular first upper connecting plate 71, a first lower connecting plate 72 and a first upper connecting plate 71 and a first lower connecting plate 72 vertically arranged on the first upper connecting plate 71 and the first lower connecting plate The cylindrical bearing 73 in the middle of 72, the first upper connecting plate 71 and the first lower connecting plate 72 are respectively provided with a first sleeve 74 and a second sleeve 75, the upper end of the cylindrical bearing 73 passes through the first upper connecting plate 71 and the first sleeve 74, and the lower end of the cylindrical bearing 73 is embedded in the second sleeve 75, the first upper connecting plate 71 of the guide bearing 7 is connected to the second transverse plate 622 of the L-shaped connecting member 62, and the first upper connecting plate 71 is connected above the second transverse plate 622, the supporting airbag 8 includes a parallel rectangular second upper connecting plate 81, a second lower connecting plate 82 and a gourd-shaped rubber airbag 83 arranged between the second upper connecting plate 81 and the second lower connecting plate 82, the second upper connecting plate 81 of the supporting airbag 8 is connected to the second transverse plate 622 of the L-shaped connecting member 62, and the second upper connecting plate 81 is connected below the second transverse plate 622.

The airborne suspension vibration and impact test fixture has a horizontal base 22 comprising a pair of parallel third end wall plates 221, a third connecting plate 222 connected between the third end wall plates 221, and a second upper end plate 223 at the upper end of the third connecting plate 222, wherein the third connecting plate 222 is a flat-bottomed U-shape, and each of the two side walls of the horizontal base 22 has a horizontal rectangular seventh reinforcing plate 22c, and a plurality of rectangular eighth reinforcing plates 22d with arc grooves between the upper and lower ends are vertically connected between the two side walls.

The vibration and impact test fixture for airborne suspension objects has a top of the upper cover 1 provided with a plurality of first through holes 1a of Φ18, a top of the first end wall plate 11 of the upper cover 1 provided with a first threaded hole 1d of Φ16, a third through hole 3b of Φ18 provided on the leveling weight 3, the third through hole 3b of the leveling weight 3 being connected to the first threaded hole 1d in the upper cover 1 by a hexagon socket screw, a first through hole 1e of Φ18 provided on the lower end plate 13 of the upper cover 1, a second through hole 21b of Φ18 provided on the first upper end plate 213 of the vertical base 21, and a third through hole 3d of Φ16 provided on the upper cover 1. A through hole 1e is connected to the second through hole 21b in the vertical base 21 through a hexagon socket screw. A Φ16 fourth threaded hole 4a is provided on the bottom plate 4 of the suspension adapter plate. The fourth threaded hole 4a of the suspension adapter plate is connected to the first through hole 1a of the upper cover 1 through a hexagon socket screw. A cylindrical boss 214 with a circular hole in the middle is formed on the outer side of the bottom of the second connecting plate 212 of the vertical base 21. Φ23 second through holes 21a are evenly distributed radially around the periphery of the circular hole. The second through holes 21a are connected to the vertical moving coil of the vibration table through screws.

The airborne suspended object vibration and impact test fixture has a Φ18 fourth through hole 22b on the second upper end plate 223 of the horizontal base 22, and the first through hole 1e in the upper cover 1 is connected to the fourth through hole 22b in the horizontal base 22 by a hexagon socket screw, and a circular hole is formed in the middle of the bottom of the third connecting plate 222 of the horizontal base 22, and Φ20 tenth through holes 22a are evenly distributed radially around the periphery of the circular hole, and the tenth through hole 22a is connected to the horizontal slide of the vibration table by screws.

The airborne suspended object vibration and impact test fixture has a Φ16 second threaded hole 21d on the second end wall plate 211 of the vertical base 21, and a Φ18 fifth through hole 5a is provided on the first vertical plate 51 of the flexible supporting vertical plate 5. The second threaded hole 21d on the second end wall plate 211 is connected to the fifth through hole 5a on the first vertical plate 51 by screws.

The vibration and impact test fixture for airborne suspension objects described herein has a 62×22mm first waist-shaped hole 5b on the first transverse plate 52 of the flexible support vertical plate 5, a Φ22 vertical plate connecting through hole 6a is provided on the inverted trapezoidal support beam 61 of the L-shaped connecting member 62, a Φ22 airbag connecting and supporting through hole Ⅰ6b, a Φ22 guide bearing connecting through hole 6c, a Φ110 sixth through hole 6e, a 20×6mm second waist-shaped hole 6f and a Φ22 airbag connecting and supporting through hole Ⅱ6g are provided on the second transverse plate 622 of the L-shaped connecting member 62, the first waist-shaped hole 5b on the first transverse plate 52 is connected to the vertical plate connecting through hole 6a on the second transverse plate 622 by screws, a Φ22 seventh through hole Ⅰ71a is provided on the four corners of the first upper connecting plate 71 of the guide bearing 7, a Φ22 seventh through hole Ⅱ72a is provided on the four corners of the first lower connecting plate 72 of the guide bearing 7, and a Φ18 seventh through hole is provided on the first lower connecting plate 72 in the second sleeve 75 Through hole III72b, a Φ16 seventh threaded hole 73a is provided at the bottom of the cylindrical bearing 73, the seventh through hole III72b on the first lower connecting plate 72 is connected to the seventh threaded hole 73a on the cylindrical bearing 73 by screws, the seventh through hole I71a on the first upper connecting plate 71 is connected to the connecting guide bearing through hole 6c on the second cross plate 622 by screws, a Φ22 eighth through hole I81a is provided on the four corners of the second upper connecting plate 81 of the supporting airbag 8, a Φ22 eighth through hole II82a is provided on the four corners of the second lower connecting plate 82 of the supporting airbag 8, the eighth through hole I81a on the second upper connecting plate 81 is connected to the connecting supporting airbag through hole II6g by screws, the cylindrical bearing 73 passes through the sixth through hole 6e, the seventh through hole II72a on the first lower connecting plate 72 and the eighth through hole II82a on the second lower connecting plate 82 are both connected to the vibration table base by screws.

The airborne suspended object vibration and impact test fixture includes a suspended object adapter plate which further includes an adapter member Ⅰ41 connected to the middle of the bottom plate 4, and the adapter member Ⅰ41 is provided with a Φ12 horizontal through hole 4b which is perpendicular to the fourth threaded hole 4a.

The airborne suspended object vibration and impact test fixture, the suspended object adapter plate also includes an adapter II 42 connected to the middle of the bottom plate 4, and the adapter II 42 is provided with a Φ12 vertical through hole 4c parallel to the fourth threaded hole 4a.

The airborne suspension vibration and impact test fixture has a second upper connecting plate 81 and a second lower connecting plate 82 supporting the airbag 8, and a 20×6mm third waist-shaped hole 81b and a 20×6mm fourth waist-shaped hole 82b are respectively provided in the middle, and a pair of third through holes 81c and a pair of fourth through holes 82c are respectively provided on both sides of the third waist-shaped hole 81b and the fourth waist-shaped hole 82b. A pair of Φ8 sixth threaded holes 83a and a Φ8 eighth through hole III83b are respectively provided in the middle of the upper and lower top ends of the rubber airbag 83. The pair of sixth threaded holes 83a and the eighth through hole III83b are distributed in an isosceles triangle. The pair of sixth threaded holes 83a and the third through hole 81c of the rubber airbag 83 are connected by screws, and the other pair of sixth threaded holes 83a and the fourth through hole 82c of the rubber airbag 83 are connected by screws.

The first end wall plate 11, the first connecting plate 12, the lower end plate 13 and the first reinforcing plate 1c of the upper cover 1 are integrally formed; the second end wall plate 211, the second connecting plate 212, the first upper end plate 213, the second reinforcing plate 21c, the third reinforcing plate 21e and the fourth reinforcing plate 21f of the vertical base 21 are integrally formed; the third end wall plate 221, the third connecting plate 222, the second upper end plate 223, the seventh reinforcing plate 22c and the eighth reinforcing plate 22d of the horizontal base 22 are integrally formed; the bottom plate 4 and the adapter Ⅰ41 or the adapter Ⅱ42 of the suspension adapter plate are integrally formed; the first vertical plate 51, the first horizontal plate 52 and the fifth reinforcing rib 5c of the flexible supporting vertical plate 5 are integrally formed; the second vertical plate 621, the second horizontal plate 622 and the sixth reinforcing plate 6d of the L-shaped connecting member 62 are integrally formed.

On the outer wall of the upper cover 1, a plurality of reinforcing plates are arranged crosswise with the first reinforcing plate 1c, and the reinforcing plates are integrally formed with the first reinforcing plate 1c.

The first end wall plate 11 of the upper cover 1 includes an inverted flat bottom V-shaped first end wall plate upper portion and mutually parallel first end wall plate lower portions extending from the lower ends of the two side walls of the first end wall plate upper portion. The lower end plate 13 of the upper cover 1 is rectangular.

The third end wall plate 221 of the horizontal base 22 is in a flat-bottomed U-shape, and the second upper end plate 223 is in a rectangular shape.

The top of the upper cover 1 is provided with a Φ16 hoisting hole 1b, which is used to hoist the upper cover 1 during installation and transportation. There are four hoisting holes 1b distributed in a rectangular shape.

The base 2 in FIG. 1 is a vertical base 21 .

A third threaded hole 3a having a diameter of Φ14 is provided on the rectangular plate of the leveling weight 3. The third threaded hole 3a is a hoisting hole and is perpendicular to the third through hole 3b.

The suspension adapter plate is designed according to different airborne suspension shapes and connection requirements. As shown in Figures 9 and 10, the adapter I 41 and the adapter II 42 of the suspension adapter plate are respectively provided with horizontal through holes 4b and vertical through holes I 4c, both of which are test object connection holes for connecting the test objects.

The second horizontal plate 622 of the L-shaped connector 62 is provided with a second waist-shaped hole 6f, and the third waist-shaped hole 81b on the second upper connecting plate 81 corresponds to the second waist-shaped hole 6f. The rubber airbag 83 in the support airbag 8 assists in adjusting the entire clamp to a vertical state so that it does not tilt in a certain direction, and its function is equivalent to that of a spring. The eighth through hole III83b on the rubber airbag 83 is an inflation port, which is sealed with a plug after inflation. The eighth through hole III83b on the rubber airbag 83 corresponds to the third waist-shaped hole 81b on the second upper connecting plate 81. After the support airbag 8 is connected to the flexible support base, sufficient space is left at the top so that the eighth through hole III83b on the top of the rubber airbag 83 can be connected to an external inflation air pipe.

The first sleeve 74 and the second sleeve 75 in the guide bearing 7 are formed integrally with the first upper connecting plate 71 and the first lower connecting plate 72, respectively. The upper end of the cylindrical bearing 73 passes through the first upper connecting plate 71 and the first sleeve 74, that is, a circular hole with the same diameter as the first sleeve 74 is formed in the middle of the first upper connecting plate 71, and the diameter of the cylindrical bearing 73 is smaller than the inner diameter of the circular hole and the first sleeve 74, so that the cylindrical bearing 73 can swing back and forth laterally in the first sleeve 74. The first lower connecting plate 72 is provided with a seventh through hole II 72a, which is connected to the vibration table base through a screw, so that the flexible support base 6 is not eccentric when moving up and down, ensuring linear motion.

As shown in Figure 18, the rectangular second upper connecting plate 81 supporting the airbag 8 has the same size as the rectangular second lower connecting plate 82, the four eighth through holes I81a on the second upper connecting plate 81 and the four eighth through holes II82a on the second lower connecting plate 82 have the same layout, and are respectively arranged at the four corners of the second upper connecting plate 81 and the second lower connecting plate 82, and the eighth through hole II82a is connected to the vibration table base by screws.

As shown in Figures 22 and 23, it is another structure of the supporting airbag, the supporting airbag Ⅰ9, wherein the rectangular second upper connecting plate Ⅰ91 and the rectangular second lower connecting plate Ⅰ92 are different in size, the four Φ22 ninth through holes Ⅰ91a on the second upper connecting plate Ⅰ91 are arranged on the four corners of the second upper connecting plate Ⅰ91, the four Φ22 ninth through holes Ⅱ92a on the second lower connecting plate Ⅰ92 are arranged in a rectangular layout, and are arranged on the right side of the rubber airbag 83 between the second upper connecting plate Ⅰ91 and the second lower connecting plate Ⅰ92, and the second lower connecting plate Ⅰ92 is also provided with a 20×6mm fourth waist-shaped hole Ⅰ91b, and a pair of Φ12 fourth through holes Ⅰ92c are provided on both sides of the fourth waist-shaped hole Ⅰ91b, and the ninth through hole Ⅱ92a is connected to the vibration table base by screws.

As shown in FIG13 , from the layout of the connecting support airbag through hole Ⅰ6b and the connecting support airbag through hole Ⅱ6g, the above two types of support airbags 8 and support airbags Ⅰ9 are connected to the flexible support base 6 at intervals, with one support airbag 8 as shown in FIG18 in the middle, and two support airbags Ⅰ9 as shown in FIG22 arranged on both sides thereof, and installed together on the second horizontal plate 622 of the L-shaped connecting member 62. Specifically, the eighth through hole Ⅰ81a on the second upper connecting plate 81 of the support airbag 8 in FIG18 corresponds to the connecting support airbag through hole Ⅱ6g in FIG13 , and the ninth through hole Ⅰ91a on the second upper connecting plate Ⅰ91 of the support airbag Ⅰ9 in FIG22 corresponds to the connecting support airbag through hole Ⅰ6b in FIG13 .

During the vertical direction test, since the first lower connecting plate 72 in the guide bearing 7, the second lower connecting plate 82 in the support airbag 8 and the second lower connecting plate Ⅰ92 in the support airbag Ⅰ9 are all connected to the vibration table base, the first lower connecting plate 72 in the guide bearing 7, the second lower connecting plate 82 in the support airbag 8 and the second lower connecting plate Ⅰ92 in the support airbag Ⅰ9 remain stationary during the entire test process; the first upper connecting plate 71 in the guide bearing 7, the second upper connecting plate 81 in the support airbag 8 and the second upper connecting plate Ⅰ91 in the support airbag Ⅰ9 connected to the flexible support base 6, during the test, due to the vibration table moving coil applying vibration or impact excitation to the vertical base 21, the first upper connecting plate 71 in the guide bearing 7, the second upper connecting plate 81 in the support airbag 8 and the second upper connecting plate Ⅰ91 in the support airbag Ⅰ9 will move vertically with the flexible support base 6, the vertical base 21 and the upper cover 1. As shown in Figure 6, a boss 214 with a circular hole in the middle is formed on the outer side of the bottom of the second connecting plate 212 of the vertical base 21. The boss 214 structure is adapted to the dynamic coil. A plurality of triangular third reinforcing plates 21e are provided on the outer side of the boss 214 to withstand the vibration or impact applied to the vertical base 21 by the dynamic coil of the vibration table during the vertical direction test.

During the horizontal direction test, the horizontal base 22 and the upper cover 1 will move horizontally with the horizontal slide of the vibration table. As shown in FIG7 , the bottom of the horizontal base 22 is a plane, and the bottom of the horizontal base 22 is connected to the horizontal slide of the vibration table by screws, and the contact area is relatively large.

When the test is implemented, the test object is installed on the suspension adapter plate. First, the vertical test is carried out. The vertical test uses a combination of a vertical base 21, a flexible support system, an upper cover 1 and a leveling counterweight 3. The vertical test is equipped with a flexible support system. Because the vertical base is a flat-bottomed V-shaped structure, the V-shaped structure is prone to eccentricity. The flexible support system can correct this eccentricity, so there is no need to use a vertical extension table of the electric vibration table. The vertical base is connected to the vertical dynamic coil of the vibration table. Because the area of the dynamic coil of the vibration table is very small and cannot meet the general vibration test requirements, the vibration table will be equipped with a vertical extension table to provide a larger installation table for the vertical test than the dynamic coil. Although its usable area is larger than that of the dynamic coil of the vibration table, its disadvantage is that it is heavy and occupies the effective thrust of the vibration table. It is not applicable to this test, so there is no need to use the connection structure of the dynamic coil-vertical extension table-test piece, thereby effectively utilizing the thrust consumed by the vertical extension table, greatly improving the effective thrust of the electric vibration table. Formula F = ma, F is the thrust of the vibration table, and its value is constant; a is the test acceleration, and its value is constant; m is the total mass, which includes the fixture mass M1, the test piece mass M2, and the vertical extension table mass M3 (if used); according to the formula, it can be known that m = M1 + M2 + M3 is constant, the smaller M3, the larger M1 + M2, so if the vertical extension table is not used, M3 = 0, and the effective thrust is increased. After the installation is completed, the vibration control sensor, vibration monitoring sensor, and strain gauge are installed at the specified position of the test object according to the specific test requirements (the specific position varies depending on the different test objects, and the specific position is determined according to the test requirements), and the cable is fixed in accordance with the specifications. Turn on the power supply system, water supply system, and air supply system, check that there is no abnormality around the vibration table body, turn on the vibration table, and perform a characteristic frequency sweep on the entire test system. Then turn on the low-level test conditions, adjust to the test requirement state, and start the formal test. During the period, adjust the test state according to the situation. After the unidirectional test is completed, restore the original state. Then, a horizontal test is conducted. The horizontal test uses a combination of a horizontal base 22, an upper cover 1, and a leveling weight 3. The horizontal test does not require a flexible support system because the horizontal base is connected to the horizontal slide of the vibration table, and the contact area is large enough, so there is no need to use a flexible support system. Moreover, the flexible support system can only be used in the vertical direction, not in the horizontal direction. Repeat the above test implementation steps. The vibration table used in this test is manufactured by Beijing Aerospace Hill Testing Technology Co., Ltd., and the model is MPA3436/H1859A.

The upper cover 1, vertical base 21, and horizontal base 22 are integrally cast from ZL104A aluminum, and the internal stress is released by heat treatment, and the internal structure is intact after non-destructive testing. The fixture has good mechanical properties, high rigidity, high natural frequency (natural frequency 150Hz, more than twice the natural frequency 40Hz of the airborne suspension), and good transfer characteristics, and can well complete the vibration and impact test of the airborne suspension.

The top of the upper cover 1 is provided with 5*15 Φ18 first through holes 1a, which are convenient for installing different suspension adapter plates, thereby realizing a set of main structure and completing various suspension vibration and impact tests.

The suspension adapter plate is integrally formed from 1Cr15Ni4Mo3N steel to ensure that its tensile strength is greater than the tensile strength of the airborne suspension.

The leveling weight 3, the flexible support upright plate 5 and the flexible support base 6 are formed by welding of Q235 steel to ensure the connection strength.

The leveling weight 3 can be selected according to different suspended objects, such as missiles, weapon bays, equipment bays, hanging beams, adapter beams, etc., or it can be combined in pairs (different leveling weights 3 have different thicknesses and thus different masses) to form a new counterweight, thereby adjusting the center of gravity of the test system.

The support airbag 8 has an installation height of 130mm, an operating pressure of 0.6Mpa, a bearing capacity of 1229kg, a vertical stiffness of 154Kg/cm at a designed height, a natural frequency of 1.91Hz, a diameter of Φ150mm, an outer diameter of Φ208mm, a minimum compression of 80mm, a safe elongation of 190mm, and a full stroke of 110mm.

The present utility model perfectly overcomes the shortcomings of traditional suspension vibration and impact test fixtures. First, it has good mechanical properties, high rigidity, high natural frequency, and good transfer characteristics, and can well complete the vibration and impact tests of airborne suspensions; second, different leveling weights can be selected according to different suspensions, or they can be combined into new weights in pairs, so as to adjust the center of gravity of the test system and protect the test equipment; third, the top of the upper cover is designed as a porous structure, and different suspension adapter plates can be adapted according to different suspensions, so as to achieve a set of main structures, complete a variety of suspension vibration and impact tests, and save resources; fourth, the vertical direction test is equipped with a flexible support system, so that there is no need to use the vertical extension table of the electric vibration table, which greatly improves the effective thrust of the electric vibration table and increases the upper limit of the test capacity.

This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims (9)

1. The utility model provides an on-board suspended solid vibration, impact test anchor clamps, a serial communication port, include main structure, with the suspended solid keysets and flexible braced system that main structure connects, main structure includes upper cover (1), base (2) and leveling counter weight (3) that are connected with upper cover (1), the suspended solid keysets includes rectangle bottom plate (4), flexible braced system includes a pair of flexible support riser (5) that are parallel to each other, with flexible support base (6) that flexible support riser (5) are connected, with guiding bearing (7) and support gasbag (8) that flexible support base (6) are connected, upper cover (1) includes a pair of parallel first end wallboard (11), connect first connecting plate (12) and lower end board (13) of first connecting plate (12) lower extreme between first end wallboard (11), first connecting plate (12) include first connecting plate upper portion (121) and first connecting plate upper portion (121)'s both sides wall lower extreme that extend parallel to each other first connecting portion (122), upper cover (1) is equipped with one pair of perpendicular base (21) or base (21) are perpendicular to each other, first end wallboard (21) are equipped with base (21) are perpendicular to base (21) or base (2) are perpendicular to each other, A second connecting plate (212) connected between the second end wall plates (211) and a first upper end plate (213) at the upper end of the second connecting plate (212), wherein the second connecting plate (212) is flat-bottom V-shaped, a plurality of rectangular second reinforcing plates (21 c) with arc grooves between the upper end and the lower end are vertically connected between two side walls of the vertical base (21), a plurality of triangular third reinforcing plates (21 e) and fourth reinforcing plates (21 f) are respectively arranged at the outer sides of the bottom of the vertical base (21) and the outer sides of the two side walls, the leveling weight (3) is of a rectangular plate-shaped structure, the flexible supporting vertical plate (5) comprises a first vertical plate (51) and a first transverse plate (52) vertically connected with the first vertical plate (51), the first vertical plate (51) comprises a trapezoid upper part (511) with arc grooves at the upper end and a rectangular lower part (512) extending from the lower end of the trapezoid upper part (511), a plurality of triangular third reinforcing plates (21 e) and a plurality of triangular reinforcing plates (21 f) are respectively arranged in the outer sides of the bottom of the vertical base (21), the leveling weight (3) is of a rectangular plate-shaped structure, the flexible supporting vertical plate (5) comprises a first transverse plate (52) and a trapezoid supporting plate (61) vertically connected with the first transverse plate (51) at the two ends of the first transverse plate (61) and a right-shaped supporting frame (61), l type connecting piece (62) include rectangle second riser (621) and with rectangle second diaphragm (622) that second riser (621) are perpendicular to be connected, be equipped with a plurality of trapezoidal sixth reinforcing plates (6 d) in the contained angle that second riser (621) and second diaphragm (622) formed, second diaphragm (622) both ends with the perpendicular connection in inverted trapezoid supporting beam (61) both ends, direction bearing (7) are in including parallel rectangle first upper junction plate (71), first lower junction plate (72) and perpendicular setting are in cylinder bearing (73) at first upper junction plate (71) and first lower junction plate (72) middle part, first upper junction plate (71) and first lower junction plate (72) middle part are equipped with first sleeve (74) and second sleeve (75) respectively, cylinder bearing (73) upper end passes first upper junction plate (71) and first sleeve (74), cylinder bearing (73) lower extreme embedding in second sleeve (75), direction bearing (7) first upper junction plate (71) and second diaphragm (62) of direction bearing (7) are in parallel connection of second upper junction plate (81) and second upper junction plate (8) are connected, respectively The second connecting plate (82) down and set up calabash shape rubber gasbag (83) between second upper connecting plate (81) and second lower connecting plate (82), second upper connecting plate (81) of supporting gasbag (8) with second diaphragm (622) of L type connecting piece (62) are connected, second upper connecting plate (81) are connected the below of second diaphragm (622).

2. The vibration and impact test fixture for the airborne suspension of claim 1, wherein the horizontal base (22) comprises a pair of parallel third end wall plates (221), a third connecting plate (222) connected between the third end wall plates (221) and a second upper end plate (223) at the upper end of the third connecting plate (222), the third connecting plate (222) is in a flat-bottom U shape, two side walls of the horizontal base (22) are respectively provided with a horizontal rectangular seventh reinforcing plate (22 c), and a plurality of rectangular eighth reinforcing plates (22 d) with arc-shaped grooves between the upper end and the lower end are vertically connected between the two side walls.

3. The vibration and impact test fixture for the airborne suspension according to claim 1, wherein a first through hole (1 a) is formed in the top of the upper cover (1), a first threaded hole (1 d) is formed in the top of a first end wall plate (11) of the upper cover (1), a third threaded hole (3 b) is formed in the leveling weight (3), the third threaded hole (3 b) of the leveling weight (3) is connected with the first threaded hole (1 d) in the upper cover (1) through an inner hexagonal screw, a first through hole (1 e) is formed in a lower end plate (13) of the upper cover (1), a second through hole (21 b) is formed in a first upper end plate (213) of the vertical base (21), the first through hole (1 e) in the upper cover (1) is connected with the second through hole (21 b) in the vertical base (21) through an inner hexagonal screw, a fourth threaded hole (4 a) is formed in a bottom plate (4) of the leveling weight (3), the fourth threaded hole (4 a) of the suspension adapter plate is connected with the second threaded hole (21) through the upper cover (1) through the inner hexagonal screw, the second through hole (21) is uniformly distributed on the outer periphery of the second through hole (21) and is formed in a shape of a circular hole (212), the second through hole (21 a) is connected with the movable coil of the vibrating table through a screw.

4. The vibration and impact test fixture for the airborne suspension of claim 2, wherein a fourth through hole (22 b) is formed in a second upper end plate (223) of the horizontal base (22), a first through hole (1 e) in the upper cover (1) is connected with the fourth through hole (22 b) in the horizontal base (22) through an inner hexagon screw, a round hole is formed in the middle of the bottom of a third connecting plate (222) of the horizontal base (22), tenth through holes (22 a) are uniformly distributed in a radial shape on the periphery of the round hole, and the tenth through holes (22 a) are connected with a vibrating table sliding table through screws.

5. The vibration and impact test fixture for the airborne suspension of claim 1, wherein a second threaded hole (21 d) is formed in a second end wall plate (211) of the vertical base (21), a fifth through hole (5 a) is formed in a first vertical plate (51) of the flexible supporting vertical plate (5), and the second threaded hole (21 d) in the second end wall plate (211) is connected with the fifth through hole (5 a) in the first vertical plate (51) through a screw.

6. The vibration and impact test fixture for an airborne suspension according to claim 1, wherein a first waist-shaped hole (5 b) is formed in a first transverse plate (52) of the flexible supporting vertical plate (5), a connecting vertical plate through hole (6 a) is formed in a reversed trapezoid supporting beam (61) of the L-shaped connecting piece (62), a connecting supporting air bag through hole I (6 b), a connecting guiding bearing through hole (6 c), a sixth through hole (6 e), a second waist-shaped hole (6 f) and a connecting supporting air bag through hole II (6 g) are formed in a second transverse plate (622), a first waist-shaped hole (5 b) in the first transverse plate (52) is connected with the connecting vertical plate through hole (6 a) in the second transverse plate (622) through a screw, a seventh through hole I (71 a) is formed in four corners of a first upper connecting plate (71) of the guiding bearing (7), a seventh through hole II (72) of the first lower connecting plate (72) of the guiding bearing (7) is formed in four corners of the second connecting plate, a seventh through hole III (72 b) is formed in the second connecting plate (72) through a screw, a threaded hole (73) is formed in the second connecting plate (72 b) is formed in the second connecting vertical plate (72), the bearing support is characterized in that a seventh through hole I (71 a) on the first upper connecting plate (71) is connected with a connecting guide bearing through hole (6 c) on the second transverse plate (622) through a screw, an eighth through hole I (81 a) is arranged on four corners of a second upper connecting plate (81) of the support air bag (8), an eighth through hole II (82 a) is arranged on four corners of a second lower connecting plate (82) of the support air bag (8), the eighth through hole I (81 a) on the second upper connecting plate (81) is connected with a connecting support air bag through hole II (6 g) through the screw, a cylindrical bearing (73) penetrates through the sixth through hole (6 e), and the seventh through hole II (72 a) on the first lower connecting plate (72) and the eighth through hole II (82 a) on the second lower connecting plate (82) are connected with a vibrating table base through the screw.

7. The vibration and impact test fixture for the airborne suspension of claim 3, wherein the suspension adapter plate further comprises an adapter piece I (41) connected with the middle part of the bottom plate (4), and a horizontal through hole (4 b) is formed in the adapter piece I (41) and perpendicular to the fourth threaded hole (4 a).

8. The vibration and impact test fixture for the airborne suspension of claim 3, wherein the suspension adapter plate further comprises an adapter piece II (42) connected with the middle part of the bottom plate (4), and a vertical through hole (4 c) is formed in the adapter piece II (42) and is parallel to the fourth threaded hole (4 a).

9. The vibration and impact test fixture for the airborne suspension of claim 1, wherein the middle parts of the second upper connecting plate (81) and the second lower connecting plate (82) of the supporting air bag (8) are respectively provided with a third waist-shaped hole (81 b) and a fourth waist-shaped hole (82 b), two sides of the third waist-shaped hole (81 b) and the fourth waist-shaped hole (82 b) are respectively provided with a pair of third through holes (81 c) and a pair of fourth through holes (82 c), the middle parts of the upper top end and the lower top end of the rubber air bag (83) are respectively provided with a pair of sixth threaded holes (83 a) and an eighth through hole (83 b), the pair of sixth threaded holes (83 a) and the eighth through hole (83 b) are distributed in an isosceles triangle shape, the pair of sixth threaded holes (83 a) and the third through holes (81 c) of the rubber air bag (83) are connected through screws, and the other pair of sixth threaded holes (83 a) and the fourth through holes (82 c) of the rubber air bag (83) are connected through screws.